smith



(No Model.) 7 2 SheetsSheet '1. v 1: TI E FOR SWAGING NEEDLE BLANKS.

MAGHIN Patented-Feb. 28; 1893.

(No Model.) 2 sheets-sheet 2.

LT. SMITH. i MACHINE FOR SWAGING NBEDLBBLANKS.

No. 492,589. Patented Feb. 28, 1893.

UNITED STATES PATENT Orricn.

IRA T. SMITH, OF MOUNT OARMEL, OONNECTICUT.

MACHINE FOR SWAGING NEEDLE-BLANKS.

SPECIFICATION forming part of Letters Patent No. 492,589, dated February 28, 1893.

Application filed August 1, 1892.

To on whom itmay concern.-

Be it known that I, IRA T. SMITH, of Mount Carmel, in the county of New Haven and State of Connecticut, have invented a new Improvement in Machines for Swaging Needle- Blanks; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-- Figure 1, a View in front elevation ofa swaging mechanism constructed in accordance with my invention, with the retaining rings removed. Fig; 2, a view thereof in vertical central section on the line x-0c of Fig. 1, showing the rollers in side elevation. Fig. 3 is a detached perspective view of one of the rollers and the pivotal carrier thereof. Fig. 4 is a similar view of one of the anvils.

My invention relates to improved mechanism for swaging needle-blanks and for kindred operations, the object being to provide, for the operation of the swaging-dies, simple and durable apparatus adapted to be run at a very high rate of speed with the minimum of noise and Wear, and to make the quick shar blow which is necessary to the best results in swaging.

With these ends in view, my invention consists in the combination with a circular diehead having a slot extending diametrically across its face, of two movable die-blocks located in the said slot, and respectively extending to the periphery of the said head, two dies respectively mounted in the inner ends of the said blocks, an anvil-head arranged concentric with the said die-head, a circular series of inwardly projecting anvils having rounded faces, opposite in curvature from the curvature of the die head, mounted in the anvil-head, pivotal carriers for the respective anvils, rollers mounted in the respective carriers, so as to travel upon the curved faces of the anvils, and springs engaging with the respective carriers to normally hold the rollers out of line with the centers of the curved faces of the anvils, one of the said heads being rotatable.

My invention further consists in certain desumo. 441,885. ca model.)

tails of construction and combination of parts as will be hereinafter described and pointed out in the claims.

As herein shown I have provided for the rotation of the die-head A, instead of the anvil-head B, but this arrangement may be reversed if desired. Under the construction shown the anvil-head is constructed with a foot B, by means of which it is rigidly secured in place, and with a hub B which forms a bearing for the shaft A of the die-head, the said shaft being provided at its outer end with a pulley A from which it is driven. The face of the die-head is constructed with a slot A extending diametrically across it,

and receiving two corresponding die-blocks C O, the outer ends of which are rounded, and project a very little beyond the peripheral face of the head when a needle, or other object to be swaged is located between the dies C O, which they respectively carry, and which are mounted in their inner ends. spring, not shown, is provided for pushing the die-blocks outwardly so as to separate the dies to permit them to receive the thing to be swaged between them. A retaining ring or annular cap, 0 shown in Fig. 2, is secured to the face of the die-head for holding the dieblocks in place in the slot A thereof,

The anvil-head has its outer face formed with a circular series of forwardly projecting sector-shaped blocks D, arranged equi-distant from each other, and concentric wlth the diehead A. The spaces D between the said blocks, receive a circular series of anvils E, rectangular in cross-section, adapted t0 fit snugly into the said spaces, having their inner ends curved as at E proportionallyto the movement to be imparted to the dies, and their outer ends curved to the curvature of a heavy hand D against which they abut, and by which they are held in place as against endwise outward movement, and which is applied to the curved outer edges of the said blocks D. The curvature of the inner ends of the anvils is, it will be observed, opposite to the curvat-ive of the die-head, and this is the source of the quick sharp swaging blow characteristic of my improved machine. The

said band D takes the heavy thrusts of the anvils when the mechanism is in operation.

The opposite face of each anvil is provided with a corresponding groove, E respectively receiving the'parallel corresponding arms F, F, of a carrier pivotally attached to the an- Vil by a pin F, passing through the outer end thereof and through the outer ends of the said arms, the inner ends of'which are enlarged, and united by cross-pieces F21 which stiffens the carriers. A roller G, is mounted on a pin G, between the said inner ends of the arms, so as to rest upon the curved face of the anvil, which takes the entire thrust of the roller to the exclusion of the pin; the same merely holding the roller in place. Each anvil is provided with a spring H, of any suitable construction, arranged toengage with its carrier-to holdthe same,-and henceg the roller mounted therein, out ofline with the center of the curved face of the anvil. It will be observed'that the-arms F, taper from; their outerytoward their-inner ends, whereby; theyare permitted to have a:limited swinging movement-in the grooves of the anvils, the opposite walls of the said grooves limiting this movement,-and hence themovement of the rollers. A retaining ring orannular cap -I,'is provided "as shown in Fig.2 of the drawings, for'holding the anvils in place, the said cap'being secured to the block D, of the anvil head. The curved faces of'the 'anvils are arranged so that the roller in riding up from its normal position to the center of the curved face of the anvil, will move inward for a distance exactly corresponding to the inward movement to be given to the die-3 blocks and hence the dies.

that when the die-head is'rotate'd in the direction of the arrow a,with the outer endsof its die-blocks projecting a little beyond its periphery, they will engage with the "rollers and cause the same toride up'froin their normal to their central positions, whereby the. blocks will be forced inward. Then just as; soon as the rollers have reached their central j 7 positions, or have been carried a little beyond the same,1the die-blocks will be released, andthe rollers allowed to-fiy. back ,to their normal positions under the action of their springs. In'thisway'the die-blocks being rapidly-rotated ,with the die-'head-will receive in quick succession 'theinward thrusts thus derived from the-rollers which take their hearing not in their-carriersgbuton the curved inner ends, of the anvils, the contact of the die-blocks those circumstances, is often split. Again, when there is a long engagement between the die-blocks and the part which they strike, the object being swaged is apt to be "EWIStGd or turned. If, needles are being swaged, they are liable to be turned in the chuck which holds them, and their shanks are scratched and mutilated. It will thus be seen that a quick sharp blow and the briefest possible contact between the die blocks and the parts which they strike, is in the highest degree desirable. As I have elsewhere stated, the anvil-headmay be rotated instead of the diehead, but -I prefer the arrangement shown, because the die-head is much the lighter of the two. When the die-head is rotatedas provided for herein, the chuck carrying the blocks is not rotated.

"like devices or.rollers broadly, but only my "particular construction.

Having fu'llydescribed my invention, what I claim as'new, and desire to secure'by Letters Patent, is- It will be understood from the foregoing 1. In *a swagingmechanism, the combination with a circular die-head having a slot extending diametrically across its *face,o'f two .movable die blocks located in the said slot, and respectivelyextending to the periphery of the said head,two dies respectivelymountedin the inner ends of the said blocks, an'anvil-head arranged concentric with the said die-head, a circular series of inwardlyprojecting anvils having rounded inner faces, opposite in curvature from the curvature of the die head, mounted in the anvil-head, pivotal carriers for the respective anvils, rollers mounted in the respective carriers so as to travel-upon the curved faces of the anvils,- and springs engaging with the respective carriers to normally hold the rollers out of line with the centers of the curved inner faces-of the anvils, one of "the said heads being rotatable, substantially-as -described,and whereby the dies are 1 given asharp quick blow, owing to the described curvature of the working faces of the anvils.

2. In a swaging mechanism,'the combination with a circular die-head'having a slot extending'diametricallyacross its face, of two movable die-blocks located in the said slot, and respectively extending to the periphery of the head, two dies respectively mounted in the inner ends of the said blocks, an anvilhead arranged concentric with the diehead,

ICC

a circular series of inwardly projectinganvils mounted in the said head and having their inner ends rounded opposite to the curvature of the die head, and their opposite faces longitudinally grooved, pivotal carriers for the respective anvils, having two arms fitting into the grooves thereof, rollers mounted in the inner ends of the arms of the respective carriers, so as to bear upon the curved faces of the anvils to which the carriers are pivoted by the outer ends of their arms, and springs engaging with the respective carriers to normally hold the rollers out of line with the cenanvils.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses. i

IRA T. SMITH.

Witnesses:

GEO; A. ANGLE, FRED O. EARLE. 

